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单选题
The most effective method in removing water from diesel fuel oil is by（）
A
centrifuging the fuel
B
using it in the engine
C
heating the fuel tanks
D
starting the fuel
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更多 “单选题The most effective method in removing water from diesel fuel oil is by（）A centrifuging the fuelB using it in the engineC heating the fuel tanksD starting the fuel” 相关考题
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Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier?A.The viscosity of the fuel.B.The quantity of water to be removed from the fuel.C.The specific gravity of the fuel.D.The quantity of dirt to be removed from the fuel.
考题
Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily byA.heat conduction into the injected fuel oilB.heat conduction into the water jacket wallC.water circulation through passages in the holderD.fuel oil circulation through passages m the holder
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The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?A.Faulty thermostatic bypass valveB.Eroded zinc pencils in the heat exchangerC.Steam formation in the expansion tankD.Excessive leakage from jacket water pump seals
考题
The separation of impurities and water from ______is essential for good combustion of diesel engines.A.lube oilB.fuel oilC.turbine oilD.grease
考题
What quality of a diesel fuel is most significant for efficient combustion ________．A.VolatilityB.ViscosityC.Flash pointD.Specific heat
考题
单选题Care and cleanliness are required when installing diesel fuel filters （）.A
to prevent the fuel system from becoming air-houndB
to prevent the fuel system becoming clogged with dirty particlesC
both of the aboveD
to prevent the lubricating oil from leaking out of the filter element
考题
单选题Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）A
increasing the quantity of starting airB
increasing the lube oil pressureC
heating the engine fuel supplyD
heating the engine jacket water
考题
单选题The main purpose of starting the diesel engine on air briefly is（）A
to inspect if the cylinder has the water leakageB
to expel out the residual water/gas/oil from the cylinderC
to check if fuel supply is normalD
A and B
考题
单选题Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.A
fuel/water separatorsB
day tanksC
injector test standD
fuel filters
考题
单选题On most diesel engines, the governor controls the output speed by （）.A
controlling the amount of fuel injected into the cylindersB
varying the speed of the turbochargerC
adjusting the compression ratioD
changing the timing of the fuel injection camshaft
考题
单选题Due to excessive water in the fuel, a diesel engine fails to startBefore the engine can be started, the water must be removed from the （）.A
fuel pumpsB
cylindersC
fuel strainersD
all of above
考题
单选题The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）A
Faulty thermostatic bypass valveB
Eroded zinc pencils in the heat exchangerC
Steam formation in the expansion tankD
Excessive leakage from jacket water pump seal
考题
单选题Black smoke exhausting from an operating diesel engine can be caused by （）A
fuel dribbling from leaking fuel injectorsB
burning fuel with a high carbon contentC
burning fuel with a high vanadium contentD
burning fuel with a lower sulphur content
考题
单选题Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?（）A
Water discharging from the water outlet of the lube oil purifierB
Fuel oil discharging from the water outlet of the lube oil purifierC
Lube oil discharging from the water outlet of the lube oil purifierD
A change in the lube oil viscosity
考题
单选题The sludge tank installed in the diesel engine room is used to collect（） Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tankA
ⅠonlyB
Ⅱ onlyC
bothⅠand ⅡD
neitherⅠor Ⅱ
考题
单选题Fuel is ignited in a diesel engine cylinder by （）A
a spark plugB
injectorsC
the heat of compressionD
increasing jacket water temperatures
考题
单选题The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）A
centrifugal separators; the engine cylinderB
oily water separators; the engine cylinderC
oily water separators; the fuel supply systemD
centrifuges; the fuel supply system
考题
单选题The most effective warming treatment for a crew member suffering from hypothermia is（）.A
running or jumping to create heatB
lying in the sunC
a warm water bathD
mouth-to-mouth resuscitation
考题
单选题A fuel injection valve opening at pressure lower than normal will result in（）.A
late fuel injectionB
early fuel injectionC
high exhaust temperature from that cylinderD
decreased effective stroke from that injector
考题
单选题In the cylinder of a diesel engine fuel is ignited by the（）A
spark from a plug in the pre-combustion chamberB
electrical discharge from the distributorC
heat of compression within the cylinderD
heat from the fuel injection nozzle
考题
单选题Diesel engine lube oil can become contaminated as a result（）A
the water produced during combustionB
the sulfur in the fuelC
unburned fuel oilD
all of the above
考题
单选题There is a growing realization that the only effective way to achieve further reductions in vehicle（）is to replace conventional diesel fuel and gasoline with cleaner-burning fuels.A
permissionB
emissionC
omissionD
Mission
考题
单选题The most common diesel engine fuel system problems are caused by （）.A
incorrect adjustmentsB
dirty fuelC
broken fuel linesD
excessive vibration
考题
单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）A
The expansion tank should be topped offB
The thermostatic water regulating valves should be manually openedC
The fuel filters should be changedD
The engine should be turned over slowly with the indicator cocks open
考题
单选题Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）A
increase blow-by in all cylindersB
incomplete combustion in all cylinderC
overloading in all cylindersD
insufficient fuel delivery to all cylinders
考题
单选题Which of the listed conditions will affective pressure the most in the cylinder of a diesel engine?（）A
TBN of the lubricating oilB
Temperature of the lube oilC
Completeness in the mixing of the fuel and airD
Temperature of the cooling (sea) water
考题
单选题After changing out the fuel filters the diesel engine fails to restart, the most probable cause for this condition is a/an（）.A
low compressionB
air-bound fuel systemC
improper sparkD
change in viscosity
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